Cached data to avoid multiple requests - Fix #83

[mitogh]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Bug fix

• What is the current behavior? (You can also link to an open issue here)

Explained here https://github.com/moxie-lean/ng-patternlab/issues/83

• What is the new behavior (if this is a feature change)?

By setting the cache it prevents other requests generated by the gravity forms component during the run and config part.

Cache is not persistent so it does not causes any issue for next loadings or in refresh.

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

No.